I'm very confused and wondering if I might be pregnant. I had unprotected intercourse 3 times in one night on February 14, and haven't been feeling completely right since. I'm experiencing hot flashes at night at times, which never usually happen, I'm usually kind of cold. I had random headache and it went away and came back without medication but was still very uncomfortable and accompanied with a lot of unusual sneezing but no signs of a cold or anything. Also, I have been extremely gassy and sick to my stomach but I haven't been throwing up. Although, during the night I burped twice and throw up was both last week, I never actually vomitted. I've been really irritable and I had some brief back pain with lots of uncomfortable abdominal cramping and pain. Usually my period cramps are almost unbearable and I have to take very strong medicine and I can't move for the first day if I don't. Not this time, I'm still cramps but I can tolerate it unlike normal times. The other day when my period should've been here, I spotted starting early Sunday (3am), it was very light pink and very scant. It picked up by that afternoon and I thought it was a tad lighter version of my period, so I threw in a tampon and went about the rest of my day (not needing to change it until once that night but it only lasted half of Sunday and Monday. Tuesday the flow is gone. I've had 2-3 times randomly throughout the day where there's brown drops of blood but it is not flowing AT ALL. My period usually last about 5 days so this two day experience is new and I've never had just little drops of bright pink (brown today) spots of blood. Lastly, I took a home test and it was negative but I'm concerned about these things or if I was testing too early.